Window.



H. A. SULLWOLD.

WINDOW.

APPLICATION FILED 001. 1. 1916.

1 2852 ,QCQUQ lzfl'ented Gate 22, 1918.

TT @ATESS PATENT HERBERT A. SULLWOLD, OF ST. PAUL, MINNESUTA.

WINDOW.

Specification of Letters Patent.

Patented see. as. rare.

Application filed October 7, 1916. Serial No. 124,334.

To all whom it may concern:

Be it known that I, HERBERT A. SULL- wom), a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in VVin dows, of which the following is a specification.

This invention relates to the construction of windows and the like, and provides a double glazing construction which is readily applicable to sliding or hinged sash, and in which one pane, usually theinner one, is readily removable to permit cleaning of the glass, minor repairs and so forth.

In the practice of my invention I make use of a tubular metallic frame to carry the removable pane, and in the case of relatively large panes I prefer to stiffen this tubular frame by means of an internal reinforcing strip or bar. The frame so formed fits into specially formed grooves or rabbets in the sash or other window frame, and is there retained by a special type'of wedging clamp set flush in the sash and coacting to hold the removable frame in close'contact with the groove. Felt or other packing is cemented or otherwise fastened to the metal frame or to the sash to secure a tight joint.

Sashes provided with my invention and with suitable weather strips afiord sufiicient protection against the coldest weather. The invention thus provides a marked advance over the type of double window heretofore almost universally used in northern climates, as windows provided with my invention present a better architectural appearance, may be readily cleaned, and can always be opened. Thus they do not require removal in summer.

A preferred embodiment of the invention is illustrated in the accompanying drawings, in which Figure 1 is a horizontal section through a portion of a sash, showing the construction of the frame and clamp and their-relations to the sash;

Fig. 2 is a fragmentary elevation of a clamp together with portions of the removable pane and sash; I

Fig. 3 is a vertical section through the meeting rails of two sashes showing the removable frames and the modes of mounting them in the respective sashes;

Fig. 4: is a rear view of a clamp removed from the sash; and

Figs. 5 and 6 are elevations of the opposite sides of said clamp.

The upper sash is shown at 7 and is provided with a meeting rail 8. The lower sash 9 has a meeting rail 10. The sashes 7 and 9 are of usual construction, except that the muntins 11, if muntins are used, are lower to allow clearance for the removable pane which is set into and flush with the inner face of its corresponding sash.

This is accomplished by forming rabbets or grooves 12 on the inner corners of the sash frames, such rabbet's being of a form to receive and closely fit the tubular frame of the removable glass. In the lower sash the rabbet extends all around the frame, but in the upper sash the upper face of the meeting rail 8 is formed with a notch or groove 13 into which the lower member of the removable frame is set. The upper and side members of the upper sash are pro vided with rabbets like those in the lower sash. This arrangement of the upper sash while not the only one which may be made within the scope of my invention, is preferable because it brings the removable frame clear of the joint between the meeting rail and leaves space for the attachment of the sash fastener (not shown) if desired.

The upper and lower sashes are glazed as usual, the panes of glass 14 being held by putty 15 or by any other approved means.

The second or removable pane 16 for each sash is permanently mounted in a tubular frame 17 which fits into the rabbets or grooves 12 and 13 and makes a close joint by means of a felt or other packing strip 1.8. This may be cemented to the frame or in the groove as preferred. The frame may take various forms and is not even necessarily tubular, though this is preferred because it is light and because the inherent resilience of the thin metal walls may be availed of to secure a close joint with the glass. The preferred cross section of the tubular frame is shown in the drawings. and has channels or slots on its opposite sides, one of which receives the edge of the glass and the other of which receives the wedging tongues of the frame clamps, by which the frame is held in its corresponding sash.

The frame clamps are sunk into the sash with their outer surfaces flush. Each comprises a main framemember 19 and a rear cap plate 20 spaced apart and held by screws or rivets 21. Between the members 19 and 20 is rotatably mounted a turn button 22 whose ends are beveled as best shown in Fig. 5, so as to enter the groove in frame 17 and .wedge this against the packing strip 18 when the buttons are turned. The turn buttons 22 are fast on spindles 23 journaled in the members 19 and 20 and may be turned by means of a screw driver or the like inserted in a slot 24 formed for that purpose in the exposed end of spindle 23.

In the case of large panes it becomes desirable to use an internal stiffening bar in the tubular frame, and such a bar is illustrated at 25 in Fig. 1.

The invention is applicable to a wide variety of window frames and sashes and the form illustrated is chosen for purposes of explanation and is typical. Variations of the forms of the rabbets and frames are obviously possible. For example while a tubular frame is preferred for its lightness, and while a frame having opposite continu ous grooves to receive the glass and fastening clamps is preferred for its ready adaptability to various specific types of sash,

other constructions different in thesefeatures fall within the broad scope of the in vention and will suggestthemselves to the skilled mechanic. The fastener principle likewise is susceptible of various mechanical expressions as will be obvious.

The invention is applicable to various forms of metal sash, by minor and obvious changes in the form of the sash, similar to those made in the wooden sash illustrated.

Having thus described my invention, what I claim is 1. A double glazed sash, comprising a sash frame having the usual permanently seated outer glass; a bodily removable inner frame fitted into and within the thickness of the sash frame and provided with a second pane of glass or like n'iaterial spaced from the fixed glass of the main sash to produce a confined-air space between the two glasses; and means for releasably holding the inner fral'ne in place in the main sash frame.

A convertible sash, comprising a main sash-frame and a secondary bodily removable frame fitting into and within the thickness of the main frame. each of said frames being provided with glass; and locking devices carried by the main frame and adapted to be engaged with and to be disengaged from the secondary frame at will, whereby the sash may be converted from a double glazed to a ingle-glazed sash and vice versa.

naeaeao 3. In combination with a sash frame pro vided with the usual permanently seated glass or equivalent transparent medium, said sash having a frame-receiving rabbet on its inner side; a bodily removable frame mounted in said rabbet, substantially re: producing the original form or outline of the sash prior to formation of the rabbet, and provided with a second pane of glass or like transparent material, the removable frame making close contact with the main frame along its several boundaries to produce a confined-air space; and means for relcasably holding the supplemental frame in the main sash frame and permitting its bodily removal therefrom.

4:. The combination of a glazed sash having a frame-receiving rabbet on its inner side; a tubular frame having a peripheral groove, said frame being sunk into said rabbet substantially flush with the inner face of the sash; clamping means countersunk into said sash and operable to enter the peripheral groove of the frame to retain the same in place; and a pane of glass or the like mounted in said frame, and serving in conjunction with the glass of the sash proper to produce a confined-air space.

5. The combination of a glazed sash having aframe-r'eceiving rabbet on its inner side; a tubular metallic frame having inner and outer peripheral grooves, said frame being sunk into said rabbet substantially flush with the inner face of said sash; wedging clamps engaging in the outer peripheral groove of said frame to retain the same in place; and a pane of glass or the like mounted in the inner peripheral groove of said frame, the glass of the main and supplemental frames being spaced apart and the frame having a substantially air-tight bearing contact whereby a confined-air space is formed between them.

6. The combination of a sash provided with the usual permanently seated glazing and having a seat or rabbet in its inner face to receive a bodily removable frame; a frame adapted to closely fit said seat or rabbet and make a substantially air-tight joint therewith, said frame having clamp-receiving recesses in its .outer sides, and provided with a light-transmitting medium; and clamps carried by the sash-frame and adapted to enter the recesses in the removable frame to clamp and hold the same in place or to be withdrawn therefrom at will to permit bodily removal of the supplemental frame.

7. The combination of two sliding sashes each provided with a permanently seated light-transmitting medium, the upper sash having a rabbet or seat across its upper end and through the length of its sides and a groove in its meeting rail forming a continuation of such rabbet, and the lower sash having a rabbet in its inner face extending about its four boundaries; :1 bodily removable frame mounted in the groove and rubhet. of the upper sash; a bodily removable 'lrznne mounted in the rabbet of the lower sash; clamping means mounted in the respective sashes for holding the removable frames in place; and panes of light-transmitt/mg;- material mounted in said removable frames, the removable frames making; close contact with their respective sashes throughout their bonmlerie and serving with the panes of the other sashes to produce eeelefl air-confining spaces.

In testimony whereof l have signed my nmne to this specification.

IEREERT A. SULIJWQE D. 

